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LP5860RKPR Datasheet(PDF) 1 Page - Texas Instruments |
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LP5860RKPR Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 71 page  LP5861T 18-Channel High-Current LED Driver with 8-Bit Analog and 8-Bit or 16-Bit PWM Dimming 1 Features • Operating voltage range: – VCC/VLED range: 2.7 V to 5.5 V – Logic pins compatible with 1.8 V, 3.3 V, and 5 V • 18 high current and precision constant current sinks: – 125 mA per current sink when VCC ≥ 3.3 V – Device-to-device error: ±5% – Channel-to-channel error: ±5% – Phase-shift for balanced transient power • Ultra-low power consumption: – Shutdown mode: ICC ≤ 2 uA when EN = Low – Standby mode: ICC ≤ 10 uA when EN = High and CHIP_EN = 0 (data retained) – Active mode: ICC = 5 mA (typ.) when channel current = 12.5 mA • Flexible dimming options: – Individual ON/OFF control for each LED dot – Analog dimming (current gain control) • Global 3-bit Maximum Current (MC) setting for all LED dots • 3 groups of 7-bit Color Current (CC) setting for red, green, and blue • Individual 8-bit Dot Current (DC) setting for each LED dot – PWM dimming with audible-noise-free frequency • Global 8-bit PWM dimming for all LED dots • 3 programmable groups of 8-bit PWM dimming for LED dot arbitrary mapping • Individual 8-bit or 16-bit PWM dimming for each LED dot • Full addressable SRAM to minimize data traffic • Individual LED dot open and short detection • Deghosting and low brightness compensation • Interface options: – 1-MHz (max.) I2C interface when IFS = Low – 12-MHz (max.) SPI interface when IFS = High 2 Applications • LED animation and indication for: – Major and smart home appliances – Global RGB keyboard backlighting – Outdoor keypad backlighting – IR module for video surveillance and IP camera – Laser diode in optical module 3 Description The LP5861T is a high-current and high-performance LED matrix driver. The device integrates 18 constant current sinks with N (N = 6/8/11) switching MOSFETs to support N × 18 LED dots or N × 6 RGB LEDs. The LP5861T is the direct driving version to support 18 LED dots or 6 RGB LEDs. The LP5861T supports both analog dimming and PWM dimming methods. For analog dimming, each LED dot can be adjusted with 256 steps. For PWM dimming, the integrated 8-bit or 16-bit configurable PWM generators enable smooth and audible-noise- free dimming control. Each LED dot can also be arbitrarily mapped into 8-bit Group PWM to achieve dimming control together. The LP5861T device implements full addressable SRAM to minimize the data traffic. The ghost- cancellation circuitry is integrated to eliminate both upside and downside ghosting. The LP5861T also supports LED open and short detection functions. Both 1-MHz (maximum) I2C and 12-MHz (maximum) SPI are available in LP5861T. Package Information PART NUMBER PACKAGE(1) BODY SIZE (NOM) LP5861T RSM (VQFN, 32) 4.00 mm × 4.00 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. VIO_EN SDA_MOSI SCL_SCLK CS17 MCU VCC GND LP5861T ADDR1_MISO VCAP CS2 CS0 VSYNC CS1 VLED ADDR2_SS IFS VLED: 2.7 V to 5.5 V VCC: 2.7 V to 5.5 V CVCC CVIO VIO: 1.8 V to 5 V RPullup CVCAP AGND 4.7 k 1 F 1 nF 1 F Op onal CVLED 1 F Red LED Green LED Blue LED Simplified Schematic LP5861T SNVSCE4 – MAY 2023 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. ADVANCE INFORMATION for preproduction products; subject to change without notice. |
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